Julius borsum



(No Model.)

' J. BORSUM.

THRESHING MACHINE.

,503- Patented June 28, 1898 Nrrnn- STATES ATENT OFFICE,

JULIUS BRSUM, OF LILLEHAMMER, NORWAY.

THRESHING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 606,503, dated June 28, 1898. Application filed October 30, 1897. Serial No. 656,946. (No model.)

To all whom it may concern.-

Be it known that I, JULIUS BRSUM, lnechanical engineer, of Lillehammer, Norway, have invented certain new and useful Improvements in Threshing-Machines; and I do hereby declare that the following is a full, clear, and eXact description of the same.

My invention relates to threshing-machines 5 and it consists in certain new arrangements whereby the straw and grain are in a more complete manner separated from each other after having been loosened by the threshing-` drum and before they have reached the strawshakers.

The objects of my invention are to simplify the construction `of threshing machines, to limit the size of the machine, and to diminish the power necessary for driving the same. To this end my invention consists in arrangements hereinafter specied and claimed.

AnneXed drawing shows a longitudinal vertical section through the upper part of a threshing-machine, in which-V A indicates the straw-shakers, and B C D the mechanism for imparting rocking motion to the same. As my invention does not relate to these parts, which are of well-known construction, the same need no further explanation, being only'shown to make the description of the parts of invention more plain and clear. F is the feed-board, at the end of which is arranged the threshing-drum G( This drum may be provided with beaters or pegs or be of any other suitable construction. It is-surrounded by a shell H in such manner that the threshing drum or cylinderwwill throw the threshed-out grain and straw forward in a substantially horizon tal direction. From the forward end of the shell H extends a deiiecting-shell I, whose upper wall is substantially horizontal for a certain distance and then curves downward and backward to, or approximately to, the straw-shaker A, which is inclosed by said shell except at its delivery end, whereby the threshed-out grain is deflected and guided forwardly and then downwardly to the receiving end of the shaker, where it falls'intoa hopper and thence into any suitablereceiver.

In view ofthe great specific gravity of the grain relatively to the straw and lighter particles, as the chaff, said grain under the action lof the threshing-cylinder acquires a greater momentum than the lighter materials and is projected farther toward or to the receiving end of the shaker, where it is deflected downwardly by the curved end of the shell I onto the straw -shaker and is rapidly screened. The straw and chaff being lighter, and hence having less momentum, their flight toward the receiving end being,furthermore, checked in a measure by the resistance of the air above the shaker A within the shell, fall nearer to the delivery end of the shaker and are rapidly discharged from the machine free from grain. In this Way there is arranged a very effective assorting of grain and straw before the straw reaches the straw-shakers, and for this reason the length of the said straw-shakers may be reduced to vabout half the length necessary in machines where the threshed material is led straight down to the straw-shakers.

I claim` In a threshing-machine, the combination of 4the feed-board the overshot threshing-cylinder, the concave, thesemicylindrical deflecting-shell H, curved deiiecting-shell I, beneath the feed board, and y the upwardly inclined straw shaker A" adapted to move the straw out of themachine in a direction the reverse ofthat in whichit is projected into said shell I bythe cylinder, for the purpose set forth. a

In witness whereof I have hereunto set `my hand in presence of two witnesses,

JULIUS BORSUM. Witnesses:

ALFRED J. BRYN, i Aue. OLsEN. 

